Method of and apparatus for forming sulphurized fiber board containers



"Jan.3,1933. R, F, LYON ETAL 1,892,675

METHOD OF AND APPARATUS FOR FORMING SULPHURIZED FIBER BOARD CONTAINERSFiled Oc 15. 1931 7 Sheets-Sheet l Jan; 3, 1933. R. F; YON ET A1,892,675

METHOD OF AND APPARATUS FOR FORMING. SULPHURIZED FIBER BOARD CONTAINERSFiled Oct. 15, 1931 7 Sheets-Sheet 2 [En/"54 z/Z.. /.r 5 126455682fiofjom ez er' CTZ SZ Tn/am E a-* lg 5 I f A I i if 26 J0 Z M METHOD OFAND APPARATUS FOR FORMING SULPHURIZ ED FIBER BOARD CONTAINERS Filed Oct.15, 1931 '7 Sheets-Sheet 5 F v Q J R. F; LYON ET AL 2,

METHOD OF AND APPARATUS FOR FORMING SULPHURIZED FIBER BOARDCQN'I'AIIIERS Jan. 3, 1933.

7 Sheets-Sheet 4' 7 Filed Oct. 15, 1931 Jan. 3, 1933. R. F. LYON ET AL1,892,675

METHOD OF AND APPARATUS FOR FORMING SULPHURIZED FIBER BOARD CONTAINERSFiled Oct. 15, 1931 v 7 Sheets-Sheet 5 Jan.3, 1933. R. F. LYON ET ALMETHOD OF AND APPARATUS FOR FORMING SULPHURIZED FIBER BOARD CONTAINERS 7Sheets-Sheet 6 VEI"? [GT5 .f

Filed Oct. 15, 1931 fiassezl Jag/0w.

.Feirfrclsfmam METHOD OF AND APPARATUS FOR FORMING SULPHURIZED FIBERBOARD CONTAINERS Jan. 3, 1933. R. F. LYON ET AL Filed Oct. 15, 1931 7Sheets-Sheet 7' Patented Jan. 3, 1933 UNITED STATES RUSSELL r. LYON, orMENASHA, AND

oonsm, ASSIGNORS TO MARATHON PATENT OFFICE WISCONSIN, A CORPORATION OFWISCONSIN METHOD OF AND APPARATUS FOR FORMING SULPHURIZED FIBER BOARDCONTAINERS Application filed October 15, 1931. Serial No. 569,099.

This invention relates to machines for making containers andparticularly to machines for making cylindr cal cans of paper board orfiber board, but preferably of sulphurized fiber board. v

It is the primary object of this invention to provide a machine forturning out fiber board containers in which a minimum of manual controlis necessary.

It is an object of ths invention to provide a machine which is capableof receiving a sheet of material and. forming it into a container.

It is a further object of this invention to provide a machine having asingle operat ng means for forming and sealing a sulphurized fiber boardcontainer.

It is a still further object of th s invention to provide acantainer-forming machine having body and end sealing means.

It s a particular object of this invention to provide a containerforming machine having a heated mandrel and means cooperable therewithfor forming a container thereabout. i

'It is a further particular object of this invention to provide acontainer-forming machine having a heated mandrel about which the contaner is formed and means cooperable therewith for sealing the body of thecontainer and an end thereof.

It'is also an object of this invention to provide a novel process formaking fiber board containers.

Other and further important objects of this invention will be apparentfrom the disclosures in the specification and the accompany'ng drawings.

This invention (in a preferred form) is illustrated in the drawings andhereinafter more fully described.

On the drawings: Figure 1 is an end elevational view of thecontainer-forming machine of our invent'on.

Figure 2 is a sectional view taken on the line II-II of Figure 1,with--partsin elevat on. T v

Figure 3 is a sectional view taken on the line III-III of Figure 2, withparts in elevatiom Figure 4 is a sectional view taken on the line IVIVof Figure 2.

Figure 5 is a detail sectional view on the line VV of Figure 2, showingthe pressure wings folded about the mandrel.

. Figure 6 is a sectional view similar to Figure 5 but showing thepressure wings in open posit on.

Figure 7 is an enlarged vertical sectional view through he mandrel takensubstantially on the line VII-VII of Figure 4. V Figure 8 is a sectionalview taken on the lne VIII-VIII of Figure 7.

T Figure 15 is a perspective view of a container and bottomthereforformed by the mechanism of our invention.

As shown on the drawings:

The machine of our invention comprises a supporting framework A, a gluepot and associated rolls B attached to the framework A, acontainer-forming mechanism and mandrel C, a heading element D, and anoperating mechanism E controlled by air pump F.

The framework A comprises a number of supporting legs 1 on top of whicha rectangular base plate 2 is mounted. The plate 2 is provided with anumber of upstanding open sockets 3, preferably having a socket in eachcorner thereof. The sockets 3 may be welded or bolted to the plate 2, orthey may be cast integral therewith. The remainder of the supportingstructure or framework A comprises a number of posts 4, each of whichextends upwardly from one Front and rear cross pieces 5 rest onshoulders formed at the upper portions of the and serve as a support fora part of the apparatus later to be described. The cross pieces 5 haveapertures at their .ends and are fitted over the posts 4 and heldthereon by nuts 6 threaded on the ends of the posts.

posts 4 As shown in Figures 2 and 3, the base plate 2 is provided withan aperture 7 "which is surrounded by a peripheral boss 8. A cylinder 9of the lifting mechanism E fits thru the aperture 7 and is suspended byan integral collar or flange 10 which rests on the boss 8 (Figure 9). Agland 11 fitting around a piston rod 12 which extends upwardlyfrom themechanism E, serves as a guide bearing for said piston rod. Bolts 13pass thru the collar 11 and flange 10 and are threaded into the boss 8to hold the lifting mechanism E in place. The operation of the mechanismE will be explained later.

The piston rod 12 carries a forming member 14 (Fig. 1). The formingmember or carriage 14 has an upper concave surface and extends forsubstantially ,thelength of the mandrel C. A socket member 15 is formedintegrally with the under surface of the carriage 14 and receive the topend of'thepiston rod 12 upon which it is secure,- ly fastened by meansof'set screws 16.

The mandrel C is supported in cantilever fashion on a framework 17 whichextends upwardl from the plate 2 to the rear cross piece5 Figure2).

The framework 17 comprises a plate '18 which is attached to the baseplate 2 thru a lower ofiset end portion 19 that .servesto spacev theplate 18 from the posts 4. The top of the plate 18 is secured by meansof spacers 20 to t e rear cross piece 5.

The plate 18 ture 21 and two flanges 22 bound the sides of the apertureand extend for a distance therebelow. The guide flanges 22 are providedwith inner opis provided with an aperposed beveled edges 23 and verticalslots 24.

(Figure 4) for a purpose hereinafter-to appear.

A cam plate 25 which is slightly broader than plate 18 is attached tothe rear of said plate 18 and isspaced therefrom by upper and lower bars26. 4

The mandrel C (Fig. 7) comprises an inand an outer cylinder 29 fittedthereover. A surface cylinder or sheath 30 is forced over the outercylinder 29. One end of the outer cylinder 29 is provided with anenlargement or end flange 31, to which a guide plate 32 is attached. Theedges of .the'guide plate 32 are bevelled at 33 (Figure 4) so as tosnugly fit and slide in the previously described guides22 on plate 18.Thus the mandrel C' is supported in a manner to allow one end thereof tobe free so as to-permit the fin forwardly extending guide ishedcontainer to be removed, as will be subsequently explained. The mandrelC is free to move up and down in the guide flanges 22 and a stop'mernber34 (Figure 2) serves to limit downwardmovement.

Referring particularly to Figures 5' and 6, it will be seen that theforming member 14. is rovided with a substantially semi-cylindrlcalconcave upper surface 35 which fits the lower surface of the mandrel C.The forming member 14 is provided with eyes 37 along its upper edges.The eyes.37 loosely receives rods or pintles 38.

Win members 39 and 40 are'mounted on the ro s 38 by means of integralhinge eyes 41 which tightly receive the rods 38 so that the wing membersrotate with the rods. The

wing members 39 and 40 are slightly less than quarter cylinders and areadapted to be folded over the mandrel C bythe movement of the rods 38 aswill later be explained. When the wings are in folded position, as shown"in.Figure 5, a gap 42 is left between their longitudinally extendingedges.

The rods 38 extend beyond the carriage 14 and wings 39 and 40 and passthru the (slots 24 in the flanges 22 on the supporting plate 18.Attached to the end of each rod ,38. is a crank arm 43 which terminatesin a cylindrical stud 44 adapted to ride in cam sl)ots 45 and 46 on thecam plate 25 (Figure 4 Each'cam slot has an arcuate lower portion 47which forces the crank arms 43 to rotate the rods 38 as the carriagesl4is moved upwardly. Each cam slot is also provided with vertical portions48 at the upper ends of the curved portions to allow the carriagefurther upward movement after "the wings have been folded about themandrel. The cam slots are not symmetrical but cam slot 45 at the rightside of the mechanism is so formed that, as the carriage is movedupward, the rod attached to wing 39 starts to rotate before the otherrod 38 starts to rotate. Consequently the right wing 39 (Figure 5) isfolded against the mandrel C in advance of the left wing 40.

As will be seen from reference to Figures 2 and 3, the transversemembers 5 are connected by a channel member 49 which is connected to thetransverse members 5 by depending arms 50. The transverse members 5, andchannel member 49 and arfns 50 are preferably cast integral and arefirmly securedto the posts 4, as previously described. An anvil piece 51is welded or otherwise secured to the web 52 of the channel member. Theanvil 51 has a depending portion'53 which is of trapezoidal crosssection" and is of such a size as to fit within the gap 42 between thelongitudinal edges of the wing members 39 and 40 on carriage 14. Theanvil has a deep recess 54 for receiving a heating "element as will bedescribed.

iso

Referring particularly to Figures 7 and 8, will be seen that we haveprovided the mandrel C with an enlarged cylindrical recess 56 at thehead end thereof. A disc 57 is received in the recess 56, and is held inplace by bolts 58 threaded into the end of the cylinder 27 of themandrel C. The disc 57 is provided with anumber of cylindrical apertures59 extending radially thru the sides thereof and spaced about itsperiphery. The disc is also provided with a numberof pairs of shorterrecesses 60, extending parallel tor said apertures 59, the wholearrangement being such that each larger recess 59 has a, smaller recess60 on either side of it.

The endof the cylinder 29 is provided with a split ring 61, the outsidediameter of which, when in contracted position, is ap proximately thesame as the outside diameter of the sheath 30. Depending lugs 62 aresecured along the inner periphery of the ring 61. Rod members 64 aresecured in each of the lugs 62 by means of a pin 63, the lugs being sospaced about the ring 61 that the rod members extend into the apertures59. A plate 65 having an aperture 66 is slidably mounted on each of therods 64 and is ressed against the lug 2 by helical springs 6 4.. Saidsprings 67 are seated in the recesses 60 which, as previously described,are located adjacent the recesses 59.

The forward cross piece 5 has a boss 69 located centrally thereof(Figures 1 and 2). A pivot shaft 70 is threaded into the boss 69 andextends forwardly of the machine. The heading mechanism D is mounted onone end of an arm 71 which is pivoted on the end of the shaft 70 bymeans of an integral collar 72 which fits over the shaft 70. The end ofthe shaft 70 is enlarged as at 73 to keep the arm 71 from falling offand a helical spring 74: serves to resiliently space the mechanism Dfrom the free end of the mandrel C. The free end of the rod 71 isprovided with a weight 75 to counterbalance the mechanism D so that thelatter may be easily aligned with the end of the mandrel.

The details of the heading mechanism D are shown in Figures 10, 11 and12. Astub shaft 76 is journalled in-a collar 77 on the end of the arm71. The outer end of the shaft 76 is provided with a handle 78 which is'fixedly secured to the shaft, as at 79, so as to rotate the shaft. Aplate 80 is formed integral with the inner end of the shaft 76.

A second plate 81 is journalled on the shaft 76 to lie between the plate80 and the arm 71 and is fixed to the collar 77 as shown at 81a. Theplate 81 is provided with a spiral thread 82 on its inner surface.

The plate 80 has a number, preferably four, of radially extending slots83. Y The'plate is recessed adjacent the outer edge of each slot to formdepressions 84 and shoulders 85 (Figure 10).

Each sector 86 has an integral Sectors 86 corresponding in number to thenumber of slots 83 are held by the plate 80. projection 87 extendingalong its middle portion. The projections 87 are T-shaped and fit theslots 83. The webs 88 of the T-shaped projections fit thru the slots 83and the heads 89 of the projections are located in the depressions 84.It will be seen that the sectors 86 are thus free to move radially onthe plate 80, the shoulders 85 of the plate 80 being sandwiched be:tween the heads of the projections and the sectors to preventthe sectorsfrom moving forwardly or rearwardly. The outer faces of the projections87 are threaded as at 90 with threads conforming to and engaging withthe spiral thread 82 on the adjacent face of plate 81, so that byrotating the plate 80 the sectors may be caused to move radiallyinwardly and outwardly.

The sectors 86 are provided with outer peripheral flanges 91. Theflanges 91 are bevelled as at 92 so that as the sectors are drawninwardly the flanges may be easily aligned and when the sectors are ininnermost position the flanges form a continuous circular flange.

The forming mechanism is operated by a lifting mechanism, showngenerally at E, which is controlled by an air pump F.

The piston rod 12 upon which the forming member 14 is mounted terminatesin a piston93 having the usual sealing rings 94 and skirt 95 forpreventing leakage. The piston 93 is arranged to slide 'up and down inthe cylinder 9. 1 I 1 The cylinder 9 (Figures 1 and 9) has a bottom 94abolted thereto at 95a. The bottom 94a has a central aperture 96 which isinter- 1 nally threaded to receive the threaded end 97 of the pipe line98 from the air pump F.

The air pump F is connected to the lifting mechanism E by the pipe line98 in which there is mounted a storage tank 99 and a controlling valve100. The pump F is used as a compressor forcing air into the tank 99 andinto the cylinder 9, causing the piston to rise. The valve 100 serves toexhaust the cylinder to thereby lower the piston 93 and forming member14. r

The mandrel C and associated parts are heated 'by electrical means. Theheating means comprise a number of resistance elements 101 whicharemounted in cylindrical apertures 102 which are spaced about theperiphery of the inner cylinder 27. as will be clearly seen fromreference to Figure 3.

These resistance elements convert the elec- The elements 101 areconnected ment 116 which is located in the recess 54.

This element 116 is connected to the mandrel heating circuit.

Our invention also contemplates gluing apparatus B for coating thematerial which is to be formed into a container, with glue.

This apparatus B is preferably attachedto one of the posts 4 in such aposition that little effort is required to direct the material from thegluing apparatus to the mandrel.

The gluing apparatus B does not of itself form a part of'our inventionand various types may be substituted for that shown in Figure 1. Thegluing apparatus illustrated comprises an end plate or support107 whichis attached to a post 4 by aicollar 108 which is fastened about one ofthe posts 4. A glue pot 109 and heater 110 are supported in dependentrelation from the plate 107. A fountain roll 111 having a shaft 112journalled in the plate 107 has a portioh thereof dipping in the gluepot 109. Guide rolls 113 are journalled in the plate107 adjacent to theroll 111 and pressure rolls 114 are adjustably mounted on a frame 115.The pressure rolls 114 are mounted on a which slides in the frame 115. Athreaded I shaft 118 is attached thereto and is threaded thru a crossplate 119 on the frame so that it may be turned to adjust the pressureof rolls The process of making a fiber board container is carried out onour apparatus in the following manner: j

The fiber board or other'sheet material 120 x to be formed into thecontainer is twice passed over the gluing roll 108 to apply gluesuccessively along one longitudinal mar in and one transverse margin.The coated fi%er board is then placed on the forming member 14 so thatit maybe folded about the mandrel C. The material is so placed that thelongitudinal glue-coated margin will lie exposed in the gap 42 after theright wing 39 has reached its limit of travel and the other glue-coatedmargin will be at the forward or heading end of the mandrel.

v The air pump is started to move the piston 93 upwardly in thecylinder. This causes the forming member to rise and fold the 4 sheet120 about the lower surface of the vated, the studs 44 on mandrel. Asthe forming member is ele-, the crank arms 43 ride upwardly in the camslots 45, 46,'causing the rods 38 to rotate to thereby fold the wingmembers 39, 40, and the sheet 120 about the mandrel. As previously setout, the cam slots are not symmetrical but are so formed that the wingmember 39 folds over the mandrel slightly in advance of the wingmemplunger 117' and pressure has abn in its guides by the formingelement 14 and is forced against the heated anvil 51. This causes apressure against the overlapped portions 125 to form the sheet into acylinder, the heat and pressure causing the glued overlapped portions125 to permanently adhere together.

The container end 121 (Figure 14) comprising the usual disc 122 withperipheral flange 123 is placed in the heading mechanism D. The headingmechanism is then manually swung about the pivot 70 into alignment withthe mandrel. The. arm 71 is then pressed against the action of thespring 74 so that the heading mechanism and the container end member aredirectly over the end of the container. Upon turning the handle 78, thesectors 86 close in on .the end member 121 and container 120 to affordsufiicient pressure to unite the end member to the previouslycement-coated container. The resiliently mounted split ring 61 serves toequalize the pressure of the heading'mechanism about the containerincase the mechanism D is not truly aligned with the mandrel C.

By turning the handle 78 in the reverse direction, the heading mechanismmaybe opened up. The valve 100 is opened to exhaust the cylinder 9 towithdraw the carriage from the mandrel, the cam slots causing the wingsto unfold as the carriage moves downwardly. The container may then beremoved by withdrawing it from the end of the of sulphurized fiberboard.The heating elements in the mandrel serve to heat the fiber board to atemperature sufiicient to allow it to be molded about the mandrel. case,a sulphur cement such as the sulphurcasein cement described in thepatent ap lication of William R. Willauer entitled dhesive, Serial No.450,062, filed May 5, 1930, is used. The joint produced by using thissulphur-casein cement and applying heat 'ormally high shearing andbursting strength. i a

While we have described a complete mechanism for the carrying out of thesteps of forming a fiber board container, it will be understood thatvarious details of construc tion may be changed. Also, many partsv whichare shown as manually operated may be operated automatically. Forexample, the

In this pump and exhaust of valve 100 so that the lifting and loweringof the mandrel ma .be accomplished without the attention 0 an operator.Further, the heating element in the mandrel and in the anvil piece maybe operated manually or may be-connected to a thermostaticallycontrolled switch. In View of the numerous changes which may be madewithout departing from the spirit of our invention, it is to beunderstood that we do not wish to be limited by the herein disclosedembodiment of our invention but only by the scope of appended claims andthe prior art.

We claim as our invention;

1. In a machine of the class described, a supporting frame, ananvilattached to and depending from the top of said frame, a

guide member at the rear of said frame, a mandrel slidably mounted onsaid guide member for movement toward and away from said anvil, aforming member having Wings for folding a sheet of material about saidmandrel, means for raising said mandrel and forcing it against saidanvil and means cooperating with said raising means for folding saidwings about said mandrel.

2. In a machine of the class described, a supporting frame, an anvilattached to and depending from the top of said supporting frame, a guideplate at the rear of said supporting frame, a slotted cam plate attachedto said frame, a mandrel slidably mounted from said guide plate, aforming member, pintles carried by said forming member,'pressure wingsfixedlymounted on said pintles, crank arms on the ends of said pintles,said crank arms being movably guided in said slots in said cam plate andmeans for moving said forming member against said mandrel to press saidmandrel against said anvil while simultaneously in cooperation with saidslots and crankarms causing'said wings to fold about said mandrel.

3. In a machine of the class described, a stationary frame work, ananvil mounted in dependent relation therefrom, a mandrel mounted'incantilever fashion on said framework and movable toward and away fromsaid anvil, a forming member having wings for folding a sheet of mate- Irialabout said mandrel, means for successively moving said formingmember toward sa1d mandrel and sa1d mandrel toward sa1d anvil and meansin cooperatlon with said first means for folding said wings about saidmandrel.

4. In a machine of the class described, a

" framework, an anvil mounted in dependent relation from said framework,a mandrel mounted on said framework movable toward and away from sa1danvil, a forming memher having wings for folding a sheet of materialabout' saidmandrel, means for successively moving said forming membertoward.

said mandrel and said mandrel toward said anvil, means cooperating withsaid first means for folding said wings about said mandrel andheatingmeans for maintaining said mandrel at an elevated temperature toaid in forming said sheet of material into a container.

5. In a machine of the class described, a stationary frame work, ananvil mounted in dependent relation therefrom, a mandrel mounted on saidframework movable toward and away from said anvil, a forming memberincluding hinged wings for folding a sheet of material about saidmandrel, means for successively moving said forming member toward saidmandrel'and saidmandrel toward said anvil and means including cam slotsengageable by pintles of thehinge con nections of said wingscooperating'swith said first means for folding said wings about saidmandrel. c

6. In a machine of the class described, a framework, an anvil mounted independent relation from said framework, a mandrel mounted on saidframework movable toward and away from said anvil, a formingao memberincluding wings hingedly attached thereto for folding a sheet ofmaterial about i said mandrel, means for successively moving saidforming member toward said mandrel and said mandrel toward said anvil,means including cams engageable by pintles of the hinges of said wingsand cooperating with said first means for folding said wings about saidmandrel.

7. Ina machine of the class described, a

gageable with the pintles on, said forming member for folding first onewing and then the other about said mandrel to thereby fold a sheet ofmaterial about said mandrel with the ends thereof overlapping and meansfor maintaining said anvil at an elevated tem- *perature'to aid insealing the overlapping ends of said sheet about said mandrel.

8. In a machine of the class described, a framework, an anvil" mountedfrom said framework, a mandrel slidably mountedon '12 0 said frameworkfor movement toward and away from said anvil, a forming member havzlngwings for folding a sheet ,of material about sa1d mandrel, meansforsuc'cessively moving said forming member towardsaid mandrel and saidmandrel toward said anvil and means cooperating with said first meansand including a pair of -unsymmetrical cams associated with said wingsfor. folding first one wing and then the other about said mandrel tofold a sheet of material about said mandreland overlap the ends thereof,and heating elements in said anvil and-in said mandrel.

9. In a machine of the class described, a framework, an anvil supportedfrom said framework, a mandrel slidably mounted for movement toward andaway from said anvil, a forming member having wings fixedly mounted onpintles carried thereby, means for successively moving said formingmember against said mandrel and said mandrel against said anvil, meanscooperating with said first means and including a pair of unsymmetricalcams engageable by the hinge pintles of said wings for folding first onewing member and then the other about said mandrel to fold a glue-coatedsheet of material about the mandrel with the glue ends overlapping, saidwings being of a size to allow a gap between the ends thereof sovthatthe overlapping ends of the material may be forced together as themandrel moves against the anvil.

10. In a machine of the class described, in combination, a stationaryanvil, a mandrel movable relative thereto, a forming member having wingsmounted on pintles pivoted on said formin member, means for successivelymoving sai forming member against said mandrel and said mandrel againstsaid anvil, means cooperating with said first means and including camsengageable by said hinge pintles for folding said wings and a sheet ofmaterial about said mandrel and a heading member having a contractibleperipheral portion movable into cooperable engagement with an end ofsaid mandrel to seal a flanged bottom on the container formed from saidfolded sheet of material.

11. In a machine of the class described, in

' combination, a stationary anvil, a cylindrical mandrel moveablerelative thereto, a forming member having wings mounted on pintlespivoted on said forming member, means for successively moving saidforming member against said mandrel and said mandrel against said anvil,means cooperating with said first means and including cams engageable bysaid hinge pintles for folding said wings and a sheet of material aboutsaid mandrel, a heading member having a contractible peripheral portionmoveable into cooperative engagement with an end of saidmandrel to seala flanged bottom on the container formed from said folded sheet ofmaterial and resilient means on said end of said mandrel for equalizingthe ressure exerted by the peripheral portion of said heading mem- 12.In a machine of the class described, in combination, a stationary anvil,a mandrel movable relative thereto, a forming member having wingsmounted on pintles pivoted in said forming member, means for tamerformed by said folded sheet of material and heating elements in saidmandrel and in said anvil for aiding the formation of said container.

13. In amachine of the class described, in combination, a stationaryanvil, a cylindrical mandrel movable relative thereto, a forming memberhaving wings mounted on pintles pivoted in said formlng member, meansfor successively moving said forming member into cooperative engagementwith said mandrel and said mandrel into cooperative engagement with saidanvil, means cooperating with said first means and including camsengageable by said hinge intles for folding said wings and a sheet osulphurized fiber board about said mandrel, a heading member having acontractable peripheral portion movable into cooperative engagement withan end of said mandrel for sealipg a flanged bottom on the containerformed by said folded sheet of fiber board, resilient means on said endof said mandrel for equalizing the pressure exerted by the peripheralportion of said heading member and heating elements in said mandrel andin said anvil for aiding in forming and sealing the container.

14. In a machine for forming fiber board containers, a mandrel, aforming member movable with respect to said mandrel, wing membersfixedly mounted on hinge pintles journalled in said forming member and aplate having cam slots therein engageable by said hingle pintles forfolding said wings and a sheet of fiber board about said mandrel as saidforming member is moved against said mandrel.

In testimony whereof, I have hereunto subscribed my name at Green Bay,Brown County, W1s.

' PETER J. CHRISTMAN.

